Toothbrush



FIG. 1 is a side elevational view of a toothbrush showing my new design;

FIG. 2 is a bottom view of the toothbrush shown in FIG. 1;

FIG. 3 is a side view of a cap for the toothbrush shown in FIG. 1;

FIG. 4 is a perspective view of the toothbrush shown in FIG. 1. 

The ornamental design for a toothbrush, as shown. 